Krishnamurthy's father was Ramaswamy Aiyar, an accountant in Puttamangalam village in the old Tanjore district of erstwhile Madras Presidency.

Krishnamurthy's daughter Anandi was married to Sadasivam's nephew (sister's son) Ramachandran, known as Ambi in music circles.

He became very popular as a critic, witty author, political commentator and short story writer.

[citation needed] He also penned lyrics for many songs, most of which were adapted into Carnatic Music.

Kalki magazine's special issue for Annai Sarada Devi, dated the day Krishnamurthy died, was his last editorial work.